One of the things we hear again and again without substantiation is that higher power rounds accelerate gun wear. With high pressure high velocity rifles the rifling burns out in front of the chamber but that does not apply to handguns and Glocks in particular.
I can accept that greater bullet momentum will increase the load on the bearing surface between the barrel lug and the locking block, and since the locking block is almost certainly a poorer quality material than the barrel, I can accept that eventually it might need to be changed, but that is cheap enough.
Does anyone have any other ideas about what is likely to wear out to an extent which impacts the serviceable life of the pistol and is not easily and cheaply replaced? Even more, does anyone have any real information about extra wear taking place with 357SIG and .40S&W relative to 9mm?